Herbert willmott taylor



H. W. TAYLOR.

TUBE SCRAPER. APPLICATION FILED SEPT. I6, 1919.

1 ,323, 1 23 Patented Nov. 25, 1919.

HERBERT wrnmvror'r TAYLOR, or smvmrs'rnn; rnonnix, ivrnunirios;

TUBE-SCRAPER.

Specification of Letters Patent. Patent d Nov. 1919 Application filed September 16, 1919. Serial No. 324,195.

To all whom it may concern:

' Be it known that I, HERBERT WILLMOTT.

TAYLOR, a subject of the King of England, residing at Sunnyside, Phoenix, in the colony of Mauritius, have invented new and useful Improvements'in Tube-Scrapers, of which the following is a specification.

This invention relates to tube scrapers having rotary cutting members.

In apparatus in which liquids are treated while passing through tubes, scale and other matters contained in the liquid separate from it, and deposit in a more or less hard state upon the surface of the tubes; As is well known it is very frequently difficult if not impossible to remove such scaleor matters by the use of tools, without injury to the surface of the tubes, which, when such tubes are of brass, copper, and other very undesirable.

The object of this invention is primarily, to provide an improved scraping or removing .tool or appliance of the kind specified by which the removal of such scale or deposited matters can be readily effect-ed, without injury to the tube surface.

This instrument or scraper comprises rotary toothed tools, the active surface or teeth of which are pointed; and in one arrangement two sets of such tools may be employed on a carrier, each set comprising a pair of toothed wheel cutters with oppositely arranged teeth, so that the teeth act at two points, oneach side of the diameter of the tube. are supported on axes one in front of the other, the axes being in the form of pins passing through the carrier.

Between these sets of cutters or rotary tools, there is employed an adjustable support, the pin or shank of which passes through and screws in and out of the car'- rier part; and in action the head serves as a support to the body within the tube,

and keeps it in the desired position in the tube, so that it acts as a positioning means to the tools in relation to the surface 0 the tube.

The scraper, the nature of which has been The toothed tools or cutters companying drawings, in which Figure 1 above described, is illustrated in the acis a side elevation, Fig. 2 is a plan, and

Fig. 3 an end view. 4

In the drawings, 1 is the carrier or body of the instrument, 2 are the rotary toothed tools, and 3 the support for holding the body with the tools inengagement with the tube surfaces. 'represents the tube.

The tools 2, a pair. of which are mounted onthe carrier on each side of the'support 8, are mounted on pins 5, whichpass through the carrier 1; and the'supportfi screws in and out of the carrier or body 1, andis actuated andset by a handle 6.

It will be noted that theaXi's of the, sup port Sis at right angles to: the axis of the cutter 2, which may be. assumed to be of hardened tool steel. like metals, especially if they are thin, is

When the scraper is used,the support 3 is set so that the points of the-teeth of the tools 2, touch the surfaces'offthe scale of thetube. The scraper is thenmoved along the tube backward and forward by means of a hand actuating rod 7 screwed into one end of it; and by adjusting the support the cutting tools can be forced into firmer contact with the scales and the whole tube surface can be acted upon, and the' scale the tube being affected as above described and shown, the support 3 may have an enlarged head on it, with a rubber washer between its under side and'the surface of the carrier 1, and so arranged thatthis' rubber would be under compression iwhen the scraper is inserted in a tube,-and by its. resiliency the pressure of thetools upon the tube surface is produced.

l/Vhat is claimed is 1. A flue cleaner consisting of a body portion,'with a pair of rotary cutting tools mounted thereon and each projecting from opposite sldes thereof, and a support ad justable in said body portion transversely In testimony whereof I have signed my thereof and between said cutting tools. name to this specification in the presence 10 2. A flkllle cleaner ionsisting of 2; body por of two subscribing Witnesses.

tion Wit a air, 0' cuttin too s mounte 5 thereon and each projecting from opposite. HERBERT WILLMOTT TAYLOR sides thereof, and a support adjustable in Witnesses: said body portion transversely thereof and E. J. CoLLmGWooD, between said cutting tools. P. RAAFF. 

